Manufacture of vacuum plasma spraying tungsten with homogenous texture on reduced activation ferritic steel at about 873K

Tomonori Tokunaga; Hideo Watanabe; Naoaki Yoshida; Takuya Nagasaka; Ryuta Kasada; Akihiko Kimura; Masayuki Tokitani; Masatoshi Mitsuhara; Hideharu Nakashima; Suguru Masuzaki; Takeshi Takabatake; Nobuyoshi Kuroki; Koichiro Ezato; Satoshi Suzuki; Masato Akiba

doi:10.1585/pfr.8.1405111

Manufacture of vacuum plasma spraying tungsten with homogenous texture on reduced activation ferritic steel at about 873K

Tomonori Tokunaga, Hideo Watanabe, Naoaki Yoshida, Takuya Nagasaka, Ryuta Kasada, Akihiko Kimura, Masayuki Tokitani, Masatoshi Mitsuhara, Hideharu Nakashima, Suguru Masuzaki, Takeshi Takabatake, Nobuyoshi Kuroki, Koichiro Ezato, Satoshi Suzuki, Masato Akiba

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

The key to improving the heat load of vacuum plasma sprayed tungsten coatings on low activation ferritic steel maintained at low temperatures is elimination of stratified low-density layers with many large pores, in which thermal cracks propagate preferentially. The low-density layers are formed owing to the deposition of large solidified tungsten particles, which remain mainly at the periphery of the spray stream. In this study, by shading this periphery, partially homogeneous tungsten coatings without large pores were successfully obtained. The coatings are expected to show good heat load, which is feasible for nuclear fusion applications.

Original language	English
Article number	1405111
Journal	Plasma and Fusion Research
Volume	8
DOIs	https://doi.org/10.1585/pfr.8.1405111
Publication status	Published - 2013
Externally published	Yes

Keywords

Columnar grain
EBSD
F82H
First wall
Tungsten
Vacuum plasma spray

ASJC Scopus subject areas

Condensed Matter Physics

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10.1585/pfr.8.1405111

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Tokunaga, T., Watanabe, H., Yoshida, N., Nagasaka, T., Kasada, R., Kimura, A., Tokitani, M., Mitsuhara, M., Nakashima, H., Masuzaki, S., Takabatake, T., Kuroki, N., Ezato, K., Suzuki, S., & Akiba, M. (2013). Manufacture of vacuum plasma spraying tungsten with homogenous texture on reduced activation ferritic steel at about 873K. Plasma and Fusion Research, 8, [1405111]. https://doi.org/10.1585/pfr.8.1405111

Tokunaga, T, Watanabe, H, Yoshida, N, Nagasaka, T, Kasada, R, Kimura, A, Tokitani, M, Mitsuhara, M, Nakashima, H, Masuzaki, S, Takabatake, T, Kuroki, N, Ezato, K, Suzuki, S & Akiba, M 2013, 'Manufacture of vacuum plasma spraying tungsten with homogenous texture on reduced activation ferritic steel at about 873K', Plasma and Fusion Research, vol. 8, 1405111. https://doi.org/10.1585/pfr.8.1405111

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title = "Manufacture of vacuum plasma spraying tungsten with homogenous texture on reduced activation ferritic steel at about 873K",

abstract = "The key to improving the heat load of vacuum plasma sprayed tungsten coatings on low activation ferritic steel maintained at low temperatures is elimination of stratified low-density layers with many large pores, in which thermal cracks propagate preferentially. The low-density layers are formed owing to the deposition of large solidified tungsten particles, which remain mainly at the periphery of the spray stream. In this study, by shading this periphery, partially homogeneous tungsten coatings without large pores were successfully obtained. The coatings are expected to show good heat load, which is feasible for nuclear fusion applications.",

keywords = "Columnar grain, EBSD, F82H, First wall, Tungsten, Vacuum plasma spray",

author = "Tomonori Tokunaga and Hideo Watanabe and Naoaki Yoshida and Takuya Nagasaka and Ryuta Kasada and Akihiko Kimura and Masayuki Tokitani and Masatoshi Mitsuhara and Hideharu Nakashima and Suguru Masuzaki and Takeshi Takabatake and Nobuyoshi Kuroki and Koichiro Ezato and Satoshi Suzuki and Masato Akiba",

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doi = "10.1585/pfr.8.1405111",

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volume = "8",

journal = "Plasma and Fusion Research",

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AU - Tokunaga, Tomonori

AU - Watanabe, Hideo

AU - Yoshida, Naoaki

AU - Nagasaka, Takuya

AU - Kasada, Ryuta

AU - Kimura, Akihiko

AU - Tokitani, Masayuki

AU - Mitsuhara, Masatoshi

AU - Nakashima, Hideharu

AU - Masuzaki, Suguru

AU - Takabatake, Takeshi

AU - Kuroki, Nobuyoshi

AU - Ezato, Koichiro

AU - Suzuki, Satoshi

AU - Akiba, Masato

PY - 2013

Y1 - 2013

N2 - The key to improving the heat load of vacuum plasma sprayed tungsten coatings on low activation ferritic steel maintained at low temperatures is elimination of stratified low-density layers with many large pores, in which thermal cracks propagate preferentially. The low-density layers are formed owing to the deposition of large solidified tungsten particles, which remain mainly at the periphery of the spray stream. In this study, by shading this periphery, partially homogeneous tungsten coatings without large pores were successfully obtained. The coatings are expected to show good heat load, which is feasible for nuclear fusion applications.

AB - The key to improving the heat load of vacuum plasma sprayed tungsten coatings on low activation ferritic steel maintained at low temperatures is elimination of stratified low-density layers with many large pores, in which thermal cracks propagate preferentially. The low-density layers are formed owing to the deposition of large solidified tungsten particles, which remain mainly at the periphery of the spray stream. In this study, by shading this periphery, partially homogeneous tungsten coatings without large pores were successfully obtained. The coatings are expected to show good heat load, which is feasible for nuclear fusion applications.

KW - Columnar grain

KW - EBSD

KW - F82H

KW - First wall

KW - Tungsten

KW - Vacuum plasma spray

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Manufacture of vacuum plasma spraying tungsten with homogenous texture on reduced activation ferritic steel at about 873K

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Keywords

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